Furniture-caster



S. KOZIK.

FURNITURE CASTER.

APPLICATION FILED APR.22, I919.

Patented Jan. 13, 1920;

FIG. 4.

FIG.3.

Quota,

STANISLAW KOZ'IK, 0F INDIAN HEAD, MARYLAND.

FURNITURE-(EASTER.

Specification of Letters Patent.

Patented Jan. 13, 1920.

Application filed April 22, 1919. Serial No. 291,838.

To all whom it may concern:

Be it known that I, STANISLAW KozIK, a citizen of the United States of America, residing at Indian Head, in the county of Charles and State of Maryland, have invented certain new and useful Improvements in Furniture-Casters, of which the following is a specification.

The primary object of the invention is the provision of a caster that possesses great strength and is easy and inexpensive to manufacture, and being in the nature of a ball caster.

A further object of the invention is the manner of making a ball caster so that When once assembled, it is impossible to separate the parts without breaking the structure.

A still further object of the invention is the formation of a simple ball caster by my method, providing antifriction bearings including a single ball thrust bearing in the structure,

With these general objects in view, the invention will be more fully described in connection with the accompanying drawing and in which like reference characters designate corresponding parts throughout the several views.

In the drawing,

Figure 1 is an elevational view of the invention,

Fig. 2 is a vertical central sectional view thereof,

Fig. 3 is a central sectional view of the tubular casing employed in the process of making the caster.

Fig. 4 shows a further step in the formation of the caster with the thrust bearing and caster ball in position, the casing being partly shown in elevation.

Fig. 5 is an enlarged sectional view of a lower portion of the casing before the caster ball has been inserted and,

Fig. 6 is a transverse sectional view taken upon line VIVI of Fig. 1.

My invention comprising a caster for furniture is herein illustrated in connection with a table leg'10. A bottle-shaped casing 11 of metal in tubular form having its neck portion 12 secured upon the tapered end of the leg 10, by screws 13.

A ball 14 is positioned Within the tubular body 15 of the casing 11 hearing against the flaring dome-shaped upper end 16 of the body and a waist 17 is formed substantially centrally of the body 15 by pressure or spinning in any manner desired. 1 By this means, the ball 14 is permanently retained in the upper portion of the body 15, preferably being free to turn therein.

A ball cage consisting of a split ring 18 is secured in an annular groove 19 within the lower end of the body 15 by means of screws 20, a plurality of antifriction balls 21 being retained in sockets 22 in the body 15 by means of the ring 18 and projecting inwardly of the ring through perforations 23 in the ring.

The caster ball 24 is positioned within the A lower end portion of the body 15 contacting the thrust bearing ball 14 and the lower edge or mouth portion 25 of the body 15, is drawn inwardly in any suitable manner for imprisoning the ball 24 preventing the removal thereof and retaining the same in its operative position.

The caster is easily manufactured in this manner, with little expense, and when assembled, provides a structure in which the thrust ball 14 and bearing ball 24 are permanently retained within the casing 11. The ball 24 is free to turn upon the bearings 21 substantially contacting the free ball 14 serving as a thrust bearing for maintaining the load under excessive strains upon'the leg 10.

What I claim as new and desire to secure by Letters Patent is A ball bearing caster comprising a casing having a socket at its upper end and having superposed ball receiving chambers,

balls in said chambers, the ball in the upper chamber being engaged by the walls of the chamber above and below the transverse median line of the ball, a ball bearing cage 'STANISLAW KOZIK. 

